// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/public/browser/web_contents_user_data.h"

#include <memory>

#include "content/public/browser/web_contents.h"
#include "content/public/test/test_renderer_host.h"
#include "content/public/test/web_contents_tester.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace content {

class WebContentsAttachedClass1
    : public WebContentsUserData<WebContentsAttachedClass1> {
public:
    ~WebContentsAttachedClass1() override { }

private:
    explicit WebContentsAttachedClass1(WebContents* contents) { }
    friend class WebContentsUserData<WebContentsAttachedClass1>;
};

class WebContentsAttachedClass2
    : public WebContentsUserData<WebContentsAttachedClass2> {
public:
    ~WebContentsAttachedClass2() override { }

private:
    explicit WebContentsAttachedClass2(WebContents* contents) { }
    friend class WebContentsUserData<WebContentsAttachedClass2>;
};

DEFINE_WEB_CONTENTS_USER_DATA_KEY(WebContentsAttachedClass1);
DEFINE_WEB_CONTENTS_USER_DATA_KEY(WebContentsAttachedClass2);

typedef RenderViewHostTestHarness WebContentsUserDataTest;

TEST_F(WebContentsUserDataTest, OneInstanceTwoAttachments)
{
    WebContents* contents = web_contents();
    WebContentsAttachedClass1* class1 = WebContentsAttachedClass1::FromWebContents(contents);
    ASSERT_EQ(NULL, class1);
    WebContentsAttachedClass2* class2 = WebContentsAttachedClass2::FromWebContents(contents);
    ASSERT_EQ(NULL, class2);

    WebContentsAttachedClass1::CreateForWebContents(contents);
    class1 = WebContentsAttachedClass1::FromWebContents(contents);
    ASSERT_TRUE(class1 != NULL);
    class2 = WebContentsAttachedClass2::FromWebContents(contents);
    ASSERT_EQ(NULL, class2);

    WebContentsAttachedClass2::CreateForWebContents(contents);
    WebContentsAttachedClass1* class1again = WebContentsAttachedClass1::FromWebContents(contents);
    ASSERT_TRUE(class1again != NULL);
    class2 = WebContentsAttachedClass2::FromWebContents(contents);
    ASSERT_TRUE(class2 != NULL);
    ASSERT_EQ(class1, class1again);
    ASSERT_NE(static_cast<void*>(class1), static_cast<void*>(class2));
}

TEST_F(WebContentsUserDataTest, TwoInstancesOneAttachment)
{
    WebContents* contents1 = web_contents();
    std::unique_ptr<WebContents> contents2(
        WebContentsTester::CreateTestWebContents(browser_context(), NULL));

    WebContentsAttachedClass1* one_class = WebContentsAttachedClass1::FromWebContents(contents1);
    ASSERT_EQ(NULL, one_class);
    WebContentsAttachedClass1* two_class = WebContentsAttachedClass1::FromWebContents(contents2.get());
    ASSERT_EQ(NULL, two_class);

    WebContentsAttachedClass1::CreateForWebContents(contents1);
    one_class = WebContentsAttachedClass1::FromWebContents(contents1);
    ASSERT_TRUE(one_class != NULL);
    two_class = WebContentsAttachedClass1::FromWebContents(contents2.get());
    ASSERT_EQ(NULL, two_class);

    WebContentsAttachedClass1::CreateForWebContents(contents2.get());
    WebContentsAttachedClass1* one_class_again = WebContentsAttachedClass1::FromWebContents(contents1);
    ASSERT_TRUE(one_class_again != NULL);
    two_class = WebContentsAttachedClass1::FromWebContents(contents2.get());
    ASSERT_TRUE(two_class != NULL);
    ASSERT_EQ(one_class, one_class_again);
    ASSERT_NE(one_class, two_class);
}

TEST_F(WebContentsUserDataTest, Idempotence)
{
    WebContents* contents = web_contents();
    WebContentsAttachedClass1* clazz = WebContentsAttachedClass1::FromWebContents(contents);
    ASSERT_EQ(NULL, clazz);

    WebContentsAttachedClass1::CreateForWebContents(contents);
    clazz = WebContentsAttachedClass1::FromWebContents(contents);
    ASSERT_TRUE(clazz != NULL);

    WebContentsAttachedClass1::CreateForWebContents(contents);
    WebContentsAttachedClass1* class_again = WebContentsAttachedClass1::FromWebContents(contents);
    ASSERT_TRUE(class_again != NULL);
    ASSERT_EQ(clazz, class_again);
}

} // namespace content
